runtime math error handling

[Zsely Istvan Gyula]

Dear Developers,

I hope this is the most apropriate list for my problem.

I developed a scientific program in F77 (compiled by linux g77 directly) and in a couple of cases
mathematical errors occur (sqrt with a negative number, floating overflow). How can I handle these error in a source code procedure? I went through the online manual ( http://gcc.gnu.org/onlinedocs/gcc-3.4.6/g77/), but did not find the soulution.

Thank you for your help in advance!

Best regards,

Istvan Gy. Zsely